在电站锅炉射线检测中常会用到NB/T 47013.2和DL/T 821两项标准，标准规定的差异会导致评定结果的迥异。分别从评定范围、透照工艺和质量级别评定3个方面对两项标准进行分析比较，指出了两者间的差异，并提出在电站锅炉射线检测中采用DL/T 821时的改进措施。

NB/T 47013.2 and DL/T 821 are used widely in the radiographic testing of power plant boiler, and differences between the two standards will lead to very different evaluation results. This paper analyzes and compares the differences between the standards above from three aspects:assessment range, radiographic technology and quality classification assessment, and points out the improvement measures of boiler radiographic testing which uses DL/T 821.